The pals and former 'Seinfeld' co-stars gave passersby a thrill when they walked into the iconic diner with a camera crew.

Jason Alexander and Jerry Seinfeld, co-stars in the hit 1990s sitcom "Seinfeld," were spotted by a keen-eyed passerby going into Tom's Restaurant in Morningside Heights, the same diner frequented by the characters of their hit show.